• Extech MG300  13 Function Wireless True RMS MultiMeter/Insulation Tester

MultiMeter/1000V Insulation Tester with Wireless PC interface (915MHz):

The MG300 is a True RMS multimeter with built-in insulation resistance tester with the added safety of wireless data streaming for remote monitoring and data logging. By adding insulation testing capabilities to the ubiquitous digital multimeter, electricians are always equipped for insulation testing, helping make it a more routine part of predictive maintenance with faster troubleshooting and repairs without additional tools. The rugged and waterproof (IP67-rated) combination meter includes a digital insulation resistance tester (or megohmmeter) with 4 different test voltages for measuring resistance up to 4GΩ with 0.001MΩ resolution. Complete with remote receiver with USB cable, windows compatible software, heavy duty test leads, alligator clip test lead, type K bead wire temperature probe with adapter, carrying case, and 6 x AA batteries.


  • Wireless USB interface transmits measurement data to a PC
  • Backlit super large triple display
  • 125V, 250V, 500V, and 1000V test voltages
  • Insulation Resistance from 0.001MOhm to 4000MOhm
  • Auto discharge of capacitive voltage
  • Lock Power On Function for hands-free operation
  • Data Hold, Min/Max, Relative mode, Auto power off
  • Complete with USB receiver, Windows® software, test leads & alligator clips, bead wire temperature probe, carrying case and batteries



Specifications                                         Range
Insulation Tester                                                                                                                                                                                                                                                                                     Insulation Resistance                          4MΩ, 40MΩ, 400MΩ, 4000MΩ
  Insulation Test Voltages                   125V, 250V, 500V, 1000V
Multimeter
AC Voltage                                           1000V
DC Voltage                                           1000V
AC Current                                           10A
DC Current                                          10A
Resistance                                           40MΩ
Capacitance                                        40mF
Frequency                                          100MHZ
Duty Cycle                                          0.1 to 99.9%
Temperature                                      -58 to 1832°F
                                                            -50 to 1000°C
4-20mA%                                            -25 to 125%
Continuity/Diode                               Yes
Power source                                     6 x AA batteries
Dimensions                                        7.8 x 3.6 x 1.9” (200 x 92 x 50m
Weight                                                20.5oz (582g)


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Extech MG300 13 Function Wireless True RMS MultiMeter/Insulation Tester


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